Python Language Server uses too much CPU

[brettcannon]

@VelizarVESSELINOV commented on Tue Dec 04 2018

Environment data

• VS Code version: 1.29.1
• Extension version (available under the Extensions sidebar): 2018.11.0
• OS and version: macOS Mojave 10.14.1
• Python version (& distribution if applicable, e.g. Anaconda): Python 3, Python 2...
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): N/A
• Relevant/affected Python packages and their versions: N/A

Expected behaviour

< 1% CPU

Actual behaviour

> 99% CPU

Steps to reproduce:

1. Install several versions of Python
2. Run VS Code

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

Starting Microsoft Python language server.
Microsoft Python Language Server version 0.1.65.0
Initializing for /usr/local/bin/python3

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@brettcannon commented on Wed Dec 05 2018

Do you have "python.autoComplete.extraPaths" defined?

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@PushUpek commented on Thu Dec 06 2018

I have the same issue, but only with python2

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@VelizarVESSELINOV commented on Thu Dec 06 2018

@brettcannon only in the default user settings defined as []

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@VelizarVESSELINOV commented on Thu Dec 06 2018

It is the biggest CPU consumer of all the processes: >21 hours

Side comment that maybe it is the case of @PushUpek I have a lot of files and folders in my current folder that is not Python code or libraries, questioning if Microsoft Python Server is not trying to parse GiB of data continuously in the current folder of VS Code project.

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@jonaswitt commented on Mon Dec 10 2018

+1 - I have the same problem with

VS Code 1.29.1
Microsoft Python Language Server version 0.1.65.0
Python Extension 2018.11.0
Python 2.7.15 (venv-based environment)

My python.autoComplete.extraPaths setting is also []. I tried to disable Jedi and Linting. I keep killing the process to keep my Macbook's fans from spinning, but it always respawns at 100% CPU usage.

Is there any way to disable the language server? I believe my only option right now is to disable the python extension completely.

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@dwt commented on Mon Dec 10 2018

This happens for me too. Python 2.7 with a moderately big project. What Info can I provide to help debug this?

[munael]

On #3653 (duplicate)

Just in case the differences matter:

I'll have to check on CPU use, but I didn't notice it. I'd guess it's usually reasonable, even when memory use 10GB or higher (most of the time).

I'm on Python 3 not 2, and have only that version of Python installed.

[PushUpek]

I have couple projects. On python3 is ok. But on python2 cpu usage skips to 100%.

Language Server: 0.1.65

Python output, Extension Output, etc. Is empty, no error messages

[MikhailArkhipov]

Most probably similar to #495

[Spongman]

i can repro this:

• vscode 1.30.0
• ms-ms-python.python 4.5 (only extension enabled)
• git https://github.com/mcedit/mcedit2.git --depth 1
• hit f12 on a symbol

[max-sixty]

FWIW I have the same behavior on python3.7 on the xarray repo

I've tried both the current release and the daily channel (Microsoft Python Language Server version 0.1.73.0), and I 100% CPU on both

[drorata]

Seems like I'm running into the same issue with scikit-learn. 100% and minimal RAM.

[MikhailArkhipov]

To all folks: we made some tactical fixes, but there is inherent issue to the analysis engine approach.

We are currently working on major restructuring of the static analysis engine that should address the issue with both CPU and memory. If you install Zenhub extension to Chrome, you should be able to track epic #425. The work is not trivial and is not a bug fix level change.

WIP PR #465.

Thanks you for using the LS, the feedback is much appreciated.